Answer: Hi there! 187 would be your answer.
Step-by-step explanation:
 
        
             
        
        
        
Answer:
(10x - 5) square units. 
Step-by-step explanation:
Let the lengths of equal sides be x units. 
Hence, AB + AD + DC = x + x + x = 3x 
Therefore, BC = 3x - 2

 
        
             
        
        
        
 The answer is c because the remaining number would be 10
        
             
        
        
        
Hey there :)
We have two equations:
3a + 2b = 7 
2a + 2b = 9
We need to solve simultaneously to find the values of a and b
eq.1    3a + 2b = 7
eq.2 ( 2a + 2b = 9 ) x -1  ) multiply by -1 to cancel 2b
  3a + 2b = 7
- 2a - 2b = -9         ( Add both together )
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   a = - 2 Substitute the value you found for a in a in order to find b
3( - 2 ) + 2b = 7                                                     2( - 2 ) + 2b = 9 
- 6 + 2b = 7                                    OR                  - 4 + 2b = 9
2b = 13                                                                   2b = 13        
b =  b =
                                                                 b = 